Delamination Resistance of Laminated Glass Plates Having Ethyl Vinyl Acetate, Polyvinyl Butyral and Sentryglas Plus Interlayers

Laminated glass is produced by laminating glass layers with an interlayer at specified pressure and temperatures using an autoclave. The characteristic properties of laminated glass can be affected considerably by the used interlayers. Polyvinyl Butyral, Ethyl Vinyl Acetate and SentryGlass are three common interlayers used by glass manufacturers. In order to select the appropriate interlayer parameters such as blast performance, availability, cost, durability, optical property and manufacturing equipment should be considered. Usage of laminated glass is expanding due to its safety and security property as well as comfort and design. As a consequence of possess superiority of laminated glass for structural applications in various industries, they strengthen their position between building materials. Nevertheless delamination which may be result of manufacturing process and service is regarded the primary concern and most undesirable failure mode for the analysis of laminated glass unit. For that cause it is hot research area of composite industry. Delamination strength of laminated glass with the mentioned three types of interlayers are presented in the current research. A mathematical model is presented to analyze delamination behavior of laminated glass plate. Five nonlinear equations are written in matrix form. Solution of matrix system is obtained by using special matrix solvers and successive over relaxation method is used to overcome the convergence problems. Deflection and stress values which represent mechanical behavior of unit are presented in figures. In order to carry out validation assumptions of model the finite element model was constituted. A good fit between the results is observed.

Keyword: Delamination; EVA; Laminated glass; PVB; SGP